Fresh eggplant is one of the lowest-calorie vegetables you can add to a meal. A 100 g serving of raw eggplant contains only about 25 calories, so a single slice may seem negligible at first. But once you stack slices for eggplant parmesan, ratatouille, or a grilled vegetable platter, the numbers add up — and the cooking method changes them even more than the portion size does.
This eggplant calories per slice calculator helps you estimate exactly what is on your plate. Start with the number of slices, choose a slice thickness or enter the actual weight of one slice from your kitchen scale, then select how the eggplant is prepared: raw, roasted without oil, grilled with a little oil, pan-sautéed in oil, or deep-fried and breaded. The tool instantly calculates total calories, calories per slice, total weight, and calorie density.
It is designed for home cooks, meal preppers, and anyone tracking calories or macros. You can also see rough macronutrient estimates for raw eggplant, making it easier to fit this versatile vegetable into a balanced diet. Use it before you cook, and you will know exactly how much the oil, portion, or coating affects your final meal.
Eggplant Calorie Calculator
How This Calculator Works
Eggplant is about 92% water, which is why a raw slice has so few calories. This calculator starts with the USDA reference value for raw eggplant: roughly 25 kcal per 100 g. Each slice weight estimate is then multiplied by the calorie density you select for your preparation method, and the total is scaled by the number of slices you enter.
The slice weight estimates come from a medium eggplant about 6 cm (2.4 inches) in diameter. A 1/2-inch slice weighs about 20 g, so one raw slice is only around 5 kcal. Thicker slices weigh more, and larger or smaller eggplants will change the estimate. If you want accuracy, set the thickness selector to Custom weight and type in the exact weight of a slice from your kitchen scale.
Step-by-Step Guide
- Enter the number of slices you plan to eat.
- Select the slice thickness you cut. The grams per slice assume a medium eggplant.
- For precise tracking, choose Custom weight and enter the actual weight of one slice on a food scale.
- Pick the preparation method that matches the finished dish.
- Click Calculate Calories and review the per-slice value, total, weight, and calorie density.
Reference: Slice Weights and Raw Macros
Use the table below as a quick guide for common eggplant slice sizes. Calories shown are for raw eggplant only.
| Slice thickness | Approx. weight | Raw calories per slice |
|---|---|---|
| 1/4 inch (6 mm) | 10 g | 2.5 kcal |
| 1/2 inch (12 mm) | 20 g | 5 kcal |
| 3/4 inch (19 mm) | 30 g | 7.5 kcal |
| 1 inch (25 mm) | 40 g | 10 kcal |
For raw eggplant, typical macros per 100 g are about 0.98 g protein, 5.88 g carbohydrates, 3.0 g fiber, and 0.18 g fat. Net carbs work out to about 2.9 g per 100 g, so eggplant can fit into lower-carb meal plans.
Common Mistakes to Avoid
- Forgetting absorbed oil. Pan-sautéed eggplant can absorb several tablespoons of oil for a whole batch, which can double or triple the calorie total. Weigh the oil you use or choose the oil-free roast option.
- Using whole-eggplant weight instead of slice weight. Enter the weight of one slice, not the whole eggplant. A whole medium eggplant is about 450 g and yields roughly 20 to 25 half-inch slices, so entering 450 g as the slice weight would massively overestimate calories.
- Ignoring slice thickness. A 1-inch slice can be twice the calories of a 1/2-inch slice. If you are not measuring by weight, at least be consistent with thickness.
- Assuming all cooking methods are equal. Baked no-oil eggplant is much lower in calories than breaded fried eggplant. The preparation selector is just as important as the number of slices.
Frequently Asked Questions
How many calories are in one slice of eggplant? A 1/2-inch raw slice from a medium eggplant weighs about 20 g and contains about 5 kcal. The same slice baked without oil is about 7 kcal; grilled with a light oil brush, about 11 kcal; pan-sautéed in oil, about 17 kcal; and deep-fried breaded, about 38 kcal.
Does baking eggplant add calories? Baking on its own does not add calories, but most roasted eggplant recipes call for olive oil. A teaspoon of olive oil is about 40 kcal, and eggplant soaks it up quickly. If your recipe uses oil, count it separately or choose the grilled-with-light-oil estimate.
Is eggplant good for weight loss? Yes. Raw eggplant is very low in calories and provides about 3 g of fiber per 100 g, which helps with satiety. The benefit disappears if you use a lot of oil or heavy breading, so preparation is the deciding factor.
Does salting eggplant change the calories? No. Salting draws out water and can change texture, but it does not meaningfully change the calorie or macronutrient content. Rinsing salted eggplant removes some sodium, not calories.
What about micronutrients? If you are also tracking minerals, the eggplant iron calculator shows how much of your daily need a serving provides. For comparison with other sliced produce, the fruit calories per slice calculator uses the same slice-based approach.
Additional Resources
You can look up the full nutrient profile for raw eggplant in the USDA FoodData Central database. For a general overview of varieties, cultivation, and culinary uses, see the Wikipedia article on eggplant.